We have already covered much of what Cooler Master has presented at CES 2026, specifically its new cases and case accessories, a bunch of beefy air coolers, and PSU tech, but the PC hardware maker has also shown off a slew of new water cooling gear at the show. The expansions to the MasterLiquid line-up mostly revolve around making the CPU liquid coolers faster, stealthier, and more customizable, and given that it's 2026, there is at least one LCD mounted to a CPU water block.

The most interesting part of the new AIO water cooler line-up has to be the new MasterLiquid Atmos II Stealth, which iterates on the Atmos II series with new waterblock cover designs, new unannounced Mobius 120 Black fans, as opposed to the Sickleflow Edge fans of the previous Atmos II coolers, and an impressively thin pump design. Currently, the additional pump covers consist of an LCD panel, a Pixel LED module, and a VRM fan, all of which attach magnetically to the top of the pump block. Much of the rest of the cooler remains the same, including the CPU block internals, which still use the Dual Chamber pump design. However, the new fans included with the MasterLiquid Atmos II Stealth operate at up to 2400 RPM, which is slightly slower than the 2500 RPM fans in the original Atmos II coolers.

Cooler Master has shown off a number of interesting products during CES 2026, including new PC cases and accessories and new PSU tech that might help gamers avoid the dreaded 12v-2x6 cable meltdowns that have plagued both NVIDIA and AMD's modern GPUs of late. Aside from the other products we've already covered, Cooler Master is introducing a number of updates to its CPU air coolers at CES 2026. The Cooler Master Hyper 812 is a revival of one of Cooler Master's older CPU cooler designs, and judging by what the TechPowerup team has seen on the CES 2026 showroom floor, the single-tower CPU air cooler promises to deliver impressive performance in a minimalist package. The Cooler Master booth had three versions of the Hyper 812 on show in Las Vegas: White, silver, and black. The Hyper 812 will also feature Cooler Master's Super Conductive Heat Pipes, for efficient heat transfer, and LCP fan blades, which are said to provide tighter tolerances and improve airflow. Cooler Master has not yet published official dimensions for the Hyper 812, but it claims it will be a "compact yet powerful cooling solution" with "excellent compatibility." Availability for the Hyper 812 is still unknown.

We've already taken a look at Cooler Master's new PC case designs and case accessories on the CES 2026 show floor, but the hardware company also showed off some new PSU tech and a smart power adaptor that should help address some of the issues with 12V-2x6. The core technology is called GPU Shield, and it is launching in two new products, including the new Cooler Master MWE Gold V4 modular PSUs, which will be available in 750-1,000 W variants and feature 80+ Gold ratings, and a new drop-in GPU power adaptor that sits between the GPU and the PSU with the goal of preventing 12V-2x6 cable meltdowns.

The GPU Shield system works the same way in both the PSU and the in-line adaptor, providing visual feedback to the user when installing the cable—the images below show a red LED on the PSU when the cable is incorrectly inserted and a green LED when correctly installed—and monitoring the current through the cable for imbalances. Cooler Master says that GPU Shield monitors the current in real-time and, at least in the case of the GPU, "actively intervenes" when there are any abnormalities. While it certainly isn't the first solution of its kind—ASRock has a similar system that appears to work quite well—it's interesting to see alternatives pop up, especially those that don't rely on buying an entirely new PSU.

At CES 2026, Cooler Master showed off its latest PC cases from the COSMOS and MasterFrame lines, along with a range of matching add-ons. The high-end COSMOS series now includes the new COSMOS Alpha case. It is built using a modular design, curved aluminium frame and tempered glass side panels. One of its standout features is a sliding motherboard tray, which allows the internal layout to be adjusted for cleaner airflow or liquid-cooling-focused builds. Cooler Master also includes a sliding, adjustable fan bracket that supports multiple fan sizes. COSMOS Alpha can house E-ATX and EEB motherboards in addition to ATX and microATX, graphics cards up to 400 mm long, and power supplies up to 240 mm. Cooling support includes up to 15 fans, with dual pre-installed 200 × 38 mm extra-thick fans, removable dust filters, and radiators up to 420 mm.

Cooler Master also expanded its open-frame MasterFrame lineup with the new MasterFrame 360 series, built around a 360-degree display concept. The series includes three variants: MasterFrame 360 Panorama, a sealed tempered-glass enclosure designed for full visibility and protection; MasterFrame 360 Stage Mirror, an open-frame design with a mirrored base to enhance visual depth; and MasterFrame 360 Stage LCD, which integrates a 15.6-inch display for custom visuals or use as a secondary screen.